In my opinion you should ait for the 24/96 replacement. The 8024 is very cheap and very cheerful and despite claims in this forum requires major surgery to make it sound reasonable.

Problem seems to be in the transformer, dc power supply, clock and many cheap electrolytics. If you have lots of time and patience, may be you can improve it. It will be a major undertaking to change the opamps.

The measured performance of the unit with analog in is not good - from memory thd+n was about -70dB on the 8024.